Device for adjusting boards



(No Model.)

D. S. BROWN. DEVICE FOR ADJUSTING BOARDS, &c.

:X. Patented May 5, 1885.

I I l I l I l UNITED STATES PATENT OFFICE.

DAVID s. BROWN, OF JENKINs, mrssounr.

DEVICE FOR ADJUSTING BOARDS, 80C.

SPECIFICATION forming part of Letters Patent No. 316,941, dated May 5, 1885.

Application filed October 11, 1884.

To all whom it may concern:

Be it known that I, DAVID S. BROWN, a citizen of the United States, residing at J enkins, in the county of Barry and State of Missouri, have invented certain new and useful Improvements in Devices for Adjusting Boards, &c., of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in devices for adjusting boards, slabs, &c., the object of which is to provide a cheap, simple, and durable device for effectually placing-and holding flooring, ceiling, &c., in position while being nailed. These objects I attain by means of the device illustrated in the accompanying drawings, forming a part of this specification, in which- Figure 1 is a view in elevation of the entire device. Fig. 2 is a vertical longitudinal section on the line a; w of Fig. 1.

Similar letters indicate corresponding parts in the several figures.

A A are clamps, made any desired size and shape. They are provided with teeth or brads if, to enter the sides of the joist, to which they are secured by means of the bolts B and O.

B is a bolt having a head, I), and a nut, d, which is provided with a crank or handle, D. Said bolt is used to tighten the lower part of the clamp.

O is a bolt having threads 0 where it passes through one side of the clamp, one end of said bolt being provided with crank-handle G, the other, 0 resting against the opposite clamp.

E is a bolt or pin placed between the said bolts B and C. It is made and secured at the ends in any suitable way to permit the clamps to work freely. On this pin is a lever, H, between two dogs, G G.

H is a lever, made in any desired shape, to drive a tongue, F, but is preferably bent forward, as shown, that the devive may be used near the end of the joist without having the lever strike the mop-board.

F is atongue, made of any desired shape and size, but is preferably made about the width of an ordinary joist, and'is provided with an indenture, to receive the bolt B and permit it to move back and forth. Said tongue (No model.)

also hasa rectangular head, f a shoulder, f

against which the short end h of the lever works, and on its upper front part are formed notches f, which receive the catches or dogs G G. Said dogs are made to extend back, 9, of the lever and forward with heavy heads, 9, one of which catches in a notch while the other is midway of the same. V

The device is operated thus: The lever being placed between the dogs on the pin and the tongue above the bolt B, the lower part, c of the clamp is placed straddle the joist, the screw-nut d tightened by the crank D, and the tops a are then spread by screwing in the bolt 0 by means of the crank O. This closes the bottom and drives the brads or teeth a into the sides of the joist to hold the device firmly in place. Thelever is then drawn back, which has its short end 72 drive the tongue against the board and force it up in place. One'of the dogs then holds it in'place while the board is nailed. By reversing the motion of the cranks the device is loosened, and by pressing upon the ends the dogs permit the tongue to be drawn back by hand, or, as the lever is placed back, by means of a fork, h, which receives a lug, f*, and the device is ready for use when secured to the joist.

I am aware that it is not new to construct a clamp to be fastened to a joist having a tongue, lever, and dogs. I do not therefore claim such construction, broadly; but,

Having thus described the construction and use of myinvention, what I claim as new, and desire to secure by Letters Patent, is-

Toothed clamps A A, secured to a joist by means of a cranked bolt, 0, and bolt B, having a cranked nut, d, a sliding tongue, F, having notches f, shoulder f and notch f bolt E, dogs G G, and a lever, H, having a projection, h, and a handle bent forward, all constructed, combined, and arranged to operate substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID S. BROWN.

Witnesses:

M. A. RUssELL, U. L. COLEMAN. 

